JVM_IR: never rename public/protected fields

And if that causes a platform declaration clash, that's not a problem
that can be solved without breaking the ABI anyway.

 #KT-47412 Fixed

compiler/testData/codegen/box/enum/nameClashWithCompanion.kt

@@ -0,0 +1,18 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_RUNTIME
+// MODULE: lib
+// FILE: lib.kt
+
+enum class E(val value: String) {
+    OK("K");
+
+    companion object {
+        @JvmField
+        val OK = "O"
+    }
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+fun box() = E.OK + E.OK.value